A car is heading northwest at 80Km/h and a truck is heading east at 60 Km/h. Determine the velocity of the truck relative to the car.

To determine the velocity of the truck relative to the car, we need to consider the two velocities as vectors. The car's velocity can be represented as 80 km/h in the northwest direction, and the truck's velocity can be represented as 60 km/h in the east direction.

To find the relative velocity, we can subtract the car's velocity vector from the truck's velocity vector.

Step-by-step solution:
1. Draw a coordinate system with the x-axis pointing east and the y-axis pointing north.
2. The car's velocity vector can be represented as (-80, -80) km/h since northwest is in the opposite direction of east and north.
3. The truck's velocity vector is (60, 0) km/h since it is moving only in the east direction.
4. Subtract the car's velocity vector from the truck's velocity vector: (60 - (-80), 0 - (-80)) km/h = (140, 80) km/h.

Therefore, the velocity of the truck relative to the car is 140 km/h in the east direction and 80 km/h in the north direction.